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===== Virtual COM Port =====

==== Configuring the Virtual COM Port ====

This section describes how to configure the **Virtual COM Port**. 

To open the configuration settings window, click on the device and then **Configure** directly beneath the output devices list. Alternatively, you can right-click to open the context menu and then select **Configure**. 


{{:en:mdm:configuration-com-port-contextmenu_2.png?500|}}

  
{{:en:mdm:configuration-com-port-1_2.png?500|}}


You can activate or deactivate the **Virtual COM Port** by ticking the **Enabled** box in the configuration window. 


{{:en:mdm:configuration-com-port-acknowledg_2.png?500|}}


You can choose how you want to acknowledge receipt of measurement data in **Feedback**. If you select one of the following entries, **green LED**, **red LED** or **red & green LED**, confirmation is made as soon as the virtual COM Port output device has processed the measurement value. If you want confirmation to be done by software (e.g. CAQ) then select **Via remote** from the menu list. 
 
<WRAP info>If you select **Via remote** confirmation from external software (CAQ) is expected.</WRAP>
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The name of the **Virtual COM Port** you access via Windows® is shown in the **COM port name**. You can change the name of the COM port by entering a new name and clicking **Apply** (e.g. "COM_ELIASOUT") \\ 
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Data output format can be changed in **Format options**. As standard the serial number of the transmitter, a gap, the value and Return are transmitted (ASCII 13). 

 
{{:en:mdm:configuration-com-port-format_2.png?500|}}


**Extendet** allows you to make further format changes. 


{{:en:mdm:configuration-com-port-extended_2.png?500|}}

In the entry fields, **Serial number**, **Measurement value** and **Name** you can define placeholders for the serial number and the measurement value. As a standard <S> is defined for the serial number, <M> for the measurement value and <N> for name. 
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Under **Change decimal separator** you can decide on what decimal separator. Measuring devices commonly use a decimal point as separator for data transfer. However, German language Excel files expect a decimal comma. 
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Often data is transferred with a prefix of either a '+' or 'minus'; under **Measurement value options** you can choose to add or omit '+' or '-' as a data prefix.\\
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The information is collated in the **Format** field. The example above contains the serial number, a space, the measurement value and the closing character, a carriage return. You can also add further characters. Non-displayable characters are shown as hexadecimals in chevron brackets. In this example <x0D> represents Return. 
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